Stop mechanism



y s. MAGNANO STOP MECHANISM Filed April 10, 1924 3 Sheets-Sheet 1 S. MAGNANO May 31, 1921. 1,630,708

STOP MECHANISM Filed April 10. 1924 3 Sheets-bfneet 2 S. MAGNANO May 31, 1927.

STOP MECHANISM Filed April 10, 1924 3 SheetsSneet 3 M I W n n I d l IIIIIIII/41V/l/l 7 0 I .W

rite-d May 31, 1927 l V V liliftl i i n STATES FATE? FJZFHBASTIANO MAGNANO, OF LAWRENCE, MASSACHUSETTS, ASSIGNOR T MAGNANO UQRI ORATION, OF LAWRENCE, MASSACHUSETTS, A COBPOIRATIGN 0.1T MASSA tJI-IUSETTS. Y

STOP MECHANISM.

Application filed. April 10, 1924. Serial No. 705,647.

'l'his invention pertains to machines for frame of the machine. These side members feeding articles one by one in succession are held in properly spaced relation by from a stack or magazine and relates more means of transverse bars or shafts, two of particuhirly to automatic mechanism for which are indicated at 3 and at respectively,

:3 stopping the machine whenever during its Fig. 4'. The frame'is supported for bodily ily operation it fails to deliver an armovement upon wheels or rollers and 6 i from the stuck or magazine at the which rest upon rails '7 adapted to be dis thug V posed transversely across a sheet of warp order more clearly to set forth the threads to which the drop wires are to be in new and advantageous functions arising applied."

from t use of this invention it is herein A. main drive shaft 8 is journalled in the illusti l by way of specific example as upper part of the frame at its forward end embraced in a multiple magazine machine and this shaft is furnished at opposite ends for dltlillilg metallic drop wires upon loom with cranks 9 which transmit the motion 5 warp threads and as applied to this parof the drive shaft by means of suitable slide 79 ticular nicchanisni its principal object is to bars or connecting rods 10 to the warp selectprovide means for stopping the entire mamg and positioning mechanism indicated chine whenever a drop wire fails to feed at generally at 11. As this mechanism forms the proper time from any of the magazines. no part of the present invention, its further .20 in the accompanying drawings which description is unnecessary.

illustrate a preferred en'ibodiment of the The shaft 8 is also provided with a gear h 1cm forming one of a train of gears indicated Fig. 1 is a fragmentary side elevation of generally at 12, one of said gears being the forward or delivery end of a machine for mounted upon a shaft carrying a crank 13 2 placing drop wires upon loom warp threads; which actuates a connecting rodl l, the lat 89 Fig. 2 is a similar fragmentary side eleter operating suitable mechanisnnnot shown, vation from the opposite side of the machine for feeding the drop wires toward the ole from that shown in Fig. 1.; livery end of the machine.

Fig. 3 is a front elevation bf the machine, The drop wires are contained in a maga- IW certain parts being omitted-and certain parts zine or magazines in which they are arb in ho i S r-thi ranged in compact series. In the machine .tig. f4 a fragmentary vertical section herein disclosed four substantially like and substa tially on the line l:l of Fig. 3 parallel magazines are employed. Each mashow 1g the parts as positioned during the chine comprises a supporting bar 15 over 3 orderly operation of the machine and showwhich the drop wires of hairpin type are ing the drop wires as feeding successively tostraddled. These bars are of such thickness ward the plane of the warp threads; and depth that the support the drop wires Fig. 5 is a view similar to Fig. l but inin proper position without requiring any side dicating one of the i'nagazines as being walls or other elements to keep the drop 40 empty and showing the last drop wire from wires in proper position during their forsaid magazine as just engaging a selected ward travel toward the delivery end of the warp thread; machine.

Fig. 6 is a view similar to Fig. 5 but The forward ends of the several magsshowing the parts. at a later stage in the zines are defined by atransverse plate 16 45 operation where the failure of further drop secured to the frame members 1 and 2 and 9 wires to feed has resultedin operation of the which is spaced from. the forward ends of i stop niechanisn'i; and i the magazine bars 15 a distance 17 sub-- Fr. '7 is a diagrammatic view showing av stantially equal to the thickness of one of desirable form of electrical circuit and conthe drop wires. This plate 16 is furnished nections in accordance with the present inwith a vertical slot 18 substantially in the vention. plane of each of the magazine bars 15. A. Referring to the drawings for a more depicker pin 19 projects through each of the tailed description of the mechanism the slots 18 to a distance substantially equal to numerals 1 and 2 respectively indicate op: or slightly less than the thickness of a drop 1 posite side members of the supporting wire. These picker pins are carried by heads 21 sliding upon vertical bars 20 secured to the forward or outer lace of the plate 16. The several heads 21 are connected by suitable connecting rods 21 to cranks. carried by ashaft 22 which receives its motion from one oi? the train of gears 12.

The cranks upon the shaft 22 are disposed substantially 90 apart so that the several heads 21 with their picker pins 19 are moved successively up and down. In the arrange ment shown the result is that a drop wire from one or another of the magazines is always in process of delivery such wires be ing engaged by the descending picker pins and forced downwardly through the space i 1? toward the plane of the Warp threads.

As each drop wire is ejected from the magazine its lower end is caught between a pair of feed rollers a3 and 24-. The roller 23 is mounted upon the shaft 25 which is provided with a gear meshing with one of the gears of train 12 sothat the roller 223 is positively driven and constitutes a feed roll for progressing the drop wire alter its delivery from the magazine toward the warp threads. The cooperating feed roll 524, which may be termed adetcetor roll, is mounted in bearings carried by a swinging frame or lever 26 carried by a shaft supported by the frame. A spring 27 engages the lever device 2e and normally tends to force the roll 2 1 into engagement with the roll 23.

As the dropwires are died down *ard by the rolls 23 and Qa'their lower ends come in contact with a fixed spreader device 28. At substantially the same time an oscillating bar 29 engages the drop Wire and forces it rear ardly against the spreader 28 so that its legs L and L are sprung apart to permit them to pass upon opposite sides ofthe warp thread Vi which has been selected and positioned by the mechanism 11. I

In the preferred arrangementthe drive shaft 8 is actuated by an electric motor 30, Fig. 7. One terminal of this motor is con.- nected to a conductor +ll leading from a suitable source of power. The other ter minal of the motor connected to a wire 85 connected to an insulated contact pin '36 (Figfti), carried by a bfacket" 37 mounted on the frame member 2. A movable contact pin 38 arranged to cooperate with the pin 36. carried by one arm 39 of a'bell crank; lever. Pin 38 is insulated from the arn'1'39 and is connected by a'conductor 4L1 to the source of power through which the motor receives its energy. The other arm 31 of the bell crank lever is connected to an arm 32 projecting from the lever device 26 which carries the detector roll 24. The arms 3i. and 32 are preferably united by a pin and slot connection or equivalent device.

Whilethe circuit as abovedescribcd is:

sufficient for the purposes of the present in- This movable contact pin 38 is vention it is preferred to combine therewith suitable connections operative for stopping the machine upon breakage of the warp thread to which the drop wire is being applied. For this purpose a circuit breaker interposed in the conductor ail. This circuit breaker comprises terminals l2 and 43 which normally contact, one of said terminals be ing carried by a movable member 45 constituting or carrying the armature ol an electromagnet ac. One terminal of the -magnet is connected by a conductor l? to a battery or other so urcc of power indicated at slti, the other terminal of the battery being grounded upon the frame of the machine through a. wire -19.

it) indicates a lined contact element insulated from the frame of the machine and connected by a conductor 51 to the opposite terminal of the elcctro'maguet to. A 1norable contact element 53 associated with the warpscparating and positioning mcchanisn'i 11. This contact 53 is carried by a vertically sliding lrame having a warp engaging membe 5-4: at its lower end. This Warp engaging member 5-l constitutes a feeder and so long as it is supported by the warp threads it holds the cmitact member 5;, up out oi. engagement with the contact 50. It through sliuzlcening, breakage or other cause the warp threads tail to hold the member 5-1 in normal position it drops, permitting contact 53 to engage contact 54L. AQS contact 53 is grounded on the frame of the machine the circuit is con'ipleted through the elcctro-magnet 1-6 and the motor circuit is broken between the contacts el-P. and -13.

If desired a switch etl may be disposed in the conductor 4:1 for the manual control ol the motor. p

Referring particularly to Fig. la the ITIBlLlF anism isindicated as in operative position. the contacts 36 and 38 being engaged so that the motor circuit is complete. One of the drop wires D is shown as having been fed down by the picker and as being gripped between the rolls 23 and Q-l which are feeding it still further dowmvardly lLtJWitltl the wrap threads, A second drop wire ID has just been engaged by the corresponding picker and is moving downwardly from the manazine but has notes yet been engaged by the rolls i1 and ill. Due to the successive action oi? the several picker lingers a coutimums stream of drop wiresis 'i'cd down between the rolls E23 and Q-lwhich extend transversely substantially across the entire width of the machine and so long as a single drop wire is held between the rolls the spring is unable to move them into contact.

In Fig. 5 the parts are shown as they would appear had thejlast drop wire been fedjtromone ot' the magazines. In this lip;- ure thedrop wire D represtmts a wire which hasbeenbrought from a magazine uotyet Hill like

depletedwhile the picker pin 19 of the empty magazine has nearly reached the bottom of its stroke but without ejecting a drop wire from the magazine. At this time two of the pickers are on their way up and the fourth is just beginning its down stroke so that as the drop wire 1) passes from between the rolls 23 and 21% no other wire is ready to be gripped between said rolls. Accordingly as the wire D en'ierges from the rolls the detector roll swings over into contact with the roll 23 as shown in Fig, 6. As the arm 32 moves with the roll 24; the arm 39 of the bell crank lever is immediately swung to car'- ry the contact 38 away from the contact 36 thus breaking the circuit at this point and stopping the motoiu The machine is thus stopped automatically whenever for anv reason the drop wires tail to feed in orderly succession from the several magazines onto successive warps ot' the series, As the machine stops upon any tailure of a drop wire'to feed, the operator is thus enabled to note the absence of a drop wire from its corresponding warp so that there is no danger that warps will be missed during the operation of placing wires thereon. lVhen the machine has stopped and the magazine has been replenished or any other cause ottailure has been noted and corrected, the machine may be started manually and operated until a wire has passed down between the rolls Q3 and 524i. whereupon the circuit is completed and the orderly operation of the machinecontinues.

While the above mechanism is particularly well adapted for use in machines for teed ing drop wires in its broader aspects it is of utility in other situations whenever articles are to be ted in succession from a mag;- zine.

I claim:

1.. In a machine of the class described feed means for propelling elongate thin sheet material elements, said feed means comprising a pair of cooperating teed members to one at least of which a feed motion is normally imparted, said members being disposed simultaneously to engage opposite surf aces o't one of said elongate elements one of said parts being movable bodily toward and from the other, means resiliently urging said members relatively toward each other to produce a gripping feed pressure, said members being separated in the normal opera tion of the machine solely by the elongate element which is gripped between them, and means responsive to abnormal approach of said parts in the absence of such element from between them to stop the normal "feed movement of said parts.

2. In a machine of the class described, means for propelling detached loom elements, saidqmeans comprising a pair of feed rolls, one at least of said rolls being bodily movable toward and from the other, means tending to urge said movable roll toward the other roll to produce agri'pping teed pressure between them, and means responsive to abnormal approach of the rolls in the absence of such a detached loom element from between them to stop the rotation of the driven roll.

In a machine for applying drop wires to loom warps, a drive shaft, a magazine for holding a series of drop wires, a drive element, a reciprocatory picker tor ejecting drop wires one by one from the magazine, a pair of rolls between which the eject-ed drop wires are gripped, one of said rolls being bodily movable toward and from the other, a spring tending to move the bodily niovableroll into engagement with the other roll, and means operative in response toabnormal ap proach oi the rolls in the absence of a drop wire between them to stop the drive element.

4i. In a machine for applying drop wires to loom warps, a drive shaft, a magazine for holding a series of drop wires, a picker tor ejecting said wires one by one from the magazine, a Feed roll, a second teed roll mounted to move bodily toward and from the front roll, a power shatt, connections for transmitting movement from the shaft to the picker and teed roll, a spring tending to urge the bodily movable roll into contact with the feed roll whereby resiliently to grip and feed torwa rd each drop wire as it is ejected from the magazine, and means operative in re sponse to abnormal approach of said rolls in the absence of a drop wire from between them to stop the power shaft.

5. In a machine of the class described, a magazine for independentthin sheet metal elements, means for ejecting them one by one from the magazine, a feed roll, a second roll bodily oscillable toward and from the feed, roll, said rolls gripping and feeding forward the successive elements as delivered from the magazine, a spring urging the bodily movable roll toward the feed roll to exert feeding pressure upon the elements interposed between the rolls, means for driving the operative parts of the machine, a stop device, and a link connecting the stop device with the bodily movable roll whereby, upon abnormal approach of the latter roll toward the feed roll in the absence of one of the sheet metal elements from between thennthe I stop device will be actuated by means of said spring to stop the machine.

6. In a machine for applying drop wires to loom warps, a magazine, means for ejecting drop wires one by one from the magazine, a feed roll, a detector roll movable bodily toward and from the feed roll, a spring urging the detector roll toward the feed roll for resiliently gripping the drop wires between the rolls as they are ejected from the magazine, an electric motor for driving the machine, a circuit breaker for determining the supply of current to the motor, and means operative in response to abnormal approach of the detector roll toward the feed roll to aJruate the circuit breaker to cut oil current from the motor.

"2'. In a machine of the class described a pair o'l teed rolls between which independent thin sheet metal elements are gripped and fed during the normal operation of the machine, one of said rolls being mounted upon a pivoted support to, more bodily toward and from the other, a spring: urging; said bodily movable roll toward the other to produce feeding pressure between the rolls, an electric motor for driving the machine, separable, normally engaging contacts in the circuit of said motor a lever supporting one of said contacts and a link connecting said lever with the bodily inc able roll whereby upon abnormal approach of the latter toward the other roll the contacts will be separated by the action oit said spring and the motor circuit broken.

8. In a machine for applying drop wires to 100111 warps, a plurality of magazines, an ejector for each magazine, means torope 'ating said ejectors successively whereby nor mally to deliver a substantially continuous stream of drop wires, or power-driven feed roll, a detector roll, a pivoted support for the detector roll, a spring urging the detector roll toward the feed roll resiliently to grip all of the Wires delivered from the mega zines and feed them toward the warp threade, an electric motor for driving the mechanism, normally engaging, relatively movable contacts in the motor circuin a lever supporting one oi said contacts, and means connecting the lever with the pivoted support of the detector roll whereby in response to interruption of the stream of wires the contacts will be separated and the motor circuit lnolum by abnormal approach of the detector roll to the feed roll.

Signed by me at Lawrence, bilassachusettst, this 29th day of March. 1924;.

snnasrrrano MAGNANO. 

